Disable AVX for LLVM 3.2 by default (#9391)
Disable AVX for LLVM 3.2 by default (#9391)

Due to a bug LLVM generates a C-like frame pointer prelude for functions
that use AVX instructions. This causes programs using the GHC calling
convention to crash, therefore we simply disable them. People that want
to use AVX should consider upgrading to a more current LLVM version.

Signed-off-by: Austin Seipp <7ea35d812706d9213868749011af1ed4fa2f6aa0@well-typed.com>

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